APPARATUS FOR MEASURING AN IMPEDANCE OF FUEL CELL AND METHOD OF MEASURING AN IMPEDANCE OF FUEL CELL

An apparatus for measuring an impedance of a fuel cell is configured to: output an AC current to a fuel cell; and adjust an impedance so that an impedance between the fuel cell and a load device becomes higher than an impedance between a secondary battery and the load device at a frequency of the AC current outputted to the fuel cell. The apparatus is also configured to: adjust the AC current so that a positive-electrode side AC potential difference matches a negative-electrode side AC potential difference, the positive-electrode side AC potential difference being a difference between an electric potential of the fuel cell on a positive electrode side and a middle electric potential, the negative-electrode side AC potential difference being a difference between an electric potential of the fuel cell on a negative electrode side and the middle electric potential; and calculate an impedance of the fuel cell on the basis of the adjusted AC current and at least one AC potential difference of the positive-electrode side AC potential difference and the negative-electrode side AC potential difference.